Three sided zipper for easy laundering, Available in pillow protectors, Lab-certified waterproof membrane, Blocks bed bugs, allergens and dust mites, Lab-certified H2Pro® waterproof membrane is quiet and breathable, Patented complete mattress encasement, Soft, quiet protection against bed bugs, dust mites and allergens, Deep pocket design offers a smooth, secure fit on mattresses 6" to 14" deep